Originally Posted by teeter

easiest way to look for boost leaks is to go down to the local hardware store and buy a black rubber pipe junction with 2 clamps that fits over your turbo intake and a plastic end cap to plug the other end. The buy a air compressor fitting and "install" that in the plastic end cap.

clamp too turbo and pressurize with air compressor. Some will leak past the engine/throttle plates, but not a signifigant amount like you would think...

Depending on where your BOV references manifold pressure...before or after the throttle plate...you can test that as well...just by opening the throttle and see if the leak starts or stops on the BOV.

air pressure is air pressure...whether the engine is running or not.

john